Complete Novice Needs Help

[richluvsound]

Hienz ,

thank you for that link . It helped to see things broken down into steps .

Rich

 

[Russellc]

So, how's it going?

Russellc

 

[richluvsound]

better !

So, how's it going?

Russellc

Cheers Russell,

much better .... I have found a laser company to do all my cutting of the enclosure for a very good price . All stainless steel .... Just stuff I have left over from old projects.

Ordered the extra parts I needed today ...

I'm preparing the heat sinks ready for the fets

Studying layouts and reading really basic stuff ... Things are still pretty vague - things like DC offset and linearity .

I guess I'm out of my comfort zone thats for sure 🙂

Started looking at my next project .... DAC from a Eval kit .

Rich

 

[richluvsound]

I'm very sorry to all, I did not know that the PCB boards I'm using are none sanctioned
copies . This is my first project so I'll continue with them and remove the "Pass'' as Mr Pass suggested in the F5 thread I was just reading . I will not use them again .

SORRY ALL !

 

[Nelson Pass]

As a guide to proper etiquette for these situations, I suggest
Steve Martin's story Wrong Number from the book Cruel Shoes.

😎

 

[doggy]

I have an A30 using P. Daniels boards, I just want to say using silpads works well,when you want to remove and re-install the boards.I do not use thermal paste also.

 

[richluvsound]

Cheers doggy !

I'm hoping that my next project will be built on the kosher board. Now I'm a member here I may be privy to the whereabouts of said boards 🙂

I'm an artist by profession and the notion of copyright is something I take quite seriously ..

Thanks for the heads up on the silpads.

Rich

 

[highfieldrebel]

kosher PCBs for power?

Where is a good place to buy power supply PCBs for power amps, I'm assembling parts for a BA-2 and would like to implement the rectifier - CRC filter arrangement shown in the original amplifier description. I've gathered that red is for danger 🙂

 

[Dennis Hui]

The BrianGT PCB should work fine: (Bottom of page)

DIY Chip Amplifier Kits, PCB's, Components and Information.

Picture here:

http://www.diyaudio.com/forums/chip...i-aleph-amplifier-psu-boards.html#post1168615

Cheers,
Dennis

 

[highfieldrebel]

Thanks Dennis

I bought a chip amp kit from there and the quality is excellent. The layout is a bit different though, basically
bridge - big cap - load
whereas the one sketched in the BA-2 goes
bridge - big cap - resistor - big cap - load.

I'd like to stick close to the original paper, do you anyone who sells those?
Thanks
Steve

 

[Bill Fuss]

Steve, the Aleph PS boards are different than the chip amp PS boards.
They are at the very bottom of the order form, and are what you want.

 

[highfieldrebel]

Thanks Bill, I think the part you and Dennis are referring me to is "AMP-PS-PCB". Right now this links to a spreadsheet with some amplifier BOMs. I've contacted the site to ask for a link to the correct part.

Thank you
Steve

 

[Dennis Hui]

Hi Steve,

There was some recent discussion about the BrianGT PS board:

http://www.diyaudio.com/forums/pass-labs/52188-new-aleph-mini-pcb-gb-135.html#post2338590

and a BOM a few posts down.

Cheers,
Dennis

 

[richluvsound]

Oscilloscope for Mac

Hi Gents ,

I'm looking to set up with a scope and was wondering if any members here use or have used oscilloscope software for Macs ?

Opinions and suggestions most welcome please !

TIA , Rich

 

[AndrewT]

Buy a secondhand analogue oscilloscope. Dual trace or dual beam, >=20MHz

Any software scope attachment for a computer is effectively a sampling oscilloscope and a very slow one at that.
You will be wasting your time trying to get good results from equipment that is incapable of performing well.

 

[richluvsound]

Ok Makes sense !

Thanks Andy ,

I'll keep my eyes open ... what should I expect to pay ?

Rich

 

[AndrewT]

£20 and upwards.
Buy it working (not repairable).

If you are patient Ebay gives good value.
My Tek 2235, 100MHz, dual trace, 2mV/cm, with 1 probe cost £70.
Another 2 probes cost £40.

 

[highfieldrebel]

Dennis and Bill, thank you both, order has been placed.

Steve

 

[richluvsound]

Internal Layout ?

Hi folks,

I'm looking for suggestions on the internal layout of the amp .
I thought this might be ok . Bearing in mind the objective being as much distance as possible between power and audio signal ....

Please advise .
I'm off to laser cutters tomorrow so I would love to get panel dims confirmed asap .

thanks, not a novice anymore , just a funny colour green
Rich

 

[Bill Fuss]

It's hard to get a sense of the layout size, what are your heatsink dimensions? Just at a glance it looks to be fine.

I hope you have flattened and polished the heatsink areas where the fets are mounted, it is quite important. A fine mill file will reveal how unflat they really are.

Don't forget to include some venting in your top and bottom panels.

Lookin good!